Brush.



No. 727,354. PATEN'IBD MAY 5, 1903.

J. R. GRUNDYI BRUSH.

APPLICATION rum) FEB. 16. 1903.

N0 MODEL.

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UNTTED STATES Patented May 5, 1903.

PATENT OFFICE.

JOHN R. GRUNDY, OF PHILADELPHIA, PENNSYLVANIA.

BRUSH.

SPECIFICATION forming part of Letters Patent No. 727,354, dated May 5, 1903.

Application filed February 16,1903. Serial No. 143,557. (No model.)

To all whom it may concern:

Be it known thatI, JOHN R. GRUNDY, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Brushes, of which the following is a specification.

My invention consists of an improved form of brush designed to employ in its constrnc lion horsehair, bristles, or other similar material, the object of'the invention being to provide a brush which while being of a substantial and durable form shall nevertheless be so made that its perishable part may be quickly and easily replaced, it being also desired that there shall be no metallic fitting or retaining-piece exposed on the exterior of the brush or its handle. These objects I attain as hereinafter set forth, reference being had to the accompanying drawings, in which Figure 1 is a side elevation, partly in section, of the preferred form of my improved brush, illustrating the means by which its parts are held in position; and Fig. 2 is an elevation illustrating the construction of the detachable or replaceable portion of my brush. In the above drawings, A represents the handle of the brush, which is usually of wood and in the present instance has in its enlarged end a recess CL, into which is screwed a bushing a. Said bushing is formed in the present instance with wood screw -threads upon its external surface, while there is through it an opening formed with machinethreads. I preferably form the enlarged end of the handle with a portion of slightly-reduced diameter and screw the bushing a into the recess a sufficiently to bring its outer face flush with the surface of the said projecting portion. The brush-head I form by inserting between two parallel wires a body of horsehair, bristles, or other-suitable material and then twisting said wires togetherso that the bristles b are disposed as shown in Fig. 2 and project, so as to form spiral surfaces, from between the twisted wires 1). By means of suitable dies I form a machine screw-thread on a portion of the twisted wires employed for holding the bristles or hair I), said thread b being designed to fit the internal thread in the bushing a. For the purpose of holding said hair, &c., in position I provide a removable end piece A for the handle A, forming through it a two-part cavity, and in addition a recess at one end, so as to accommodate the forwardly-projecting portion of said handle.

In assembling the parts of my improved brush the threaded portion of a brush-head of the form shown in Fig. 2isinserted through the larger opening of the end piece A and entered in the bushing a. As said head is screwed up it is gradually drawn into the head A, with the result that the bristles are bent forwardly by contact with the end and sides of the opening until they are brought to the form shown in Fig. 1, the head B thus holding in position the end A and having its bristles in turn confined and forced into brush form by said end. tion A of fiber and so proportion the bristles and portion 1) of twisted wires that when the parts are assembled none of the metallic portions of the device extend beyond the end of the piece A, so that, as will be appreciated by those skilled in the arts of weaving and spinning, the brush may be safely employed to clean machinery in which a brush having exposed metallic parts would be altogether prohibited, owingto the possibility of scratching highly-polished portions thereof.

When the bristles I) become worn or broken, the head may be replaced by simply giving an unscrewing motion to the end piece 13, thereby unscrewing the twisted wires 1) from the bushing a. The worn-out head may then be replaced by a new head and the three portions again assembled, as before described.

One advantage of this construction lies in the fact thata very few handles and end pieces may be kept on hand, depending entirely on the number required for use at any one time, while a stock consisting of a large number of heads B may for a very trifling cost be sup-r plied, so that when the brush is worn it is not necessarily thrown away, but its main and relatively valuable and costly part may be used indefinitely.

I claim as my invention- 1. The combination of a handle having a threaded bushing, .a tubular end section to said handle, a head portion including brushforming material, and a threaded stem, said threaded stem passing through the tubular I preferably form the porend section and entering the threaded bushing in the handle, substantially as described.

2. The combination of a handle having a threaded bushing, a tubular end section to said handle and a head portion consisting of twisted wires having between them brushforming material, said head portion having threads formed upon it and passing through the tubular end section so as to enter the threaded partin the handle proper, the brushforming material being held in shape by said end section, substantially as described.

3. The combination of a handle having a threaded cavity in one end, a detachable head portion formed of twisted wires and brushforming material confined between the same, screw-threads formed on said twisted wires and constructed to be retained in the threaded cavity of the handle, with a detachable tubular end section placed between the handle and the brush-forming material, said section being held in place by the head and confining the strands of brush-forming material in the desired position, substantially as described.

4. The combination of a handle having a bushing provided with internal and external threads and inserted in a cavity formed therein, the end of said handle havinga projecting portion of diminished diameter, a tubular end section having through it an opening and made with a recess to fit said projecting portion of the handle, a brush-head including a threaded portion adapted to screw into the bushing in the handle and brush-forming material carried thereby and confined in position by the tubular end section, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN R. GRUNDY.

Witnesses:

WILLIAM E. BRADLEY, J os. I-I. KLEIN. 

